Since Bartok is considered "difficult" music, I'll throw my hat in the ring regarding music that is only respected at first. But over time, you will come to love it, I promise.
To start off, I was watching "The Shining", one of Kubrick's masterpieces, and one of the pieces of music he uses is Bartok's "Music for String, Percussion, and Orchestra". Which of course made me want to listen to some of the various recordings I have. So far, I have to say that my favorite is:
Great performance, and a great recording in SACD format.
Next up - the Piano Concertos! Great music. Spicy! My preference is for something that really jangles!
Angry music performed in an angry manner.
Next up - the most modern, angst filled music around (after Shostakovich, of course). I'm talking about Bartok's incredible (miraculous) string quartet's of course! For this, I must agree with Gramaphone - the Emerson recording just knocks your socks off:
Of course there's more to Bartok than that, but these are great recordings and great performances that should satisfy any Bartok-o-phile